Quote:
Originally Posted by alanint
Remember that bulges can also occur as extration is taking place. Cases are held in the chamber partially through heat adhesion. A round which is not delayed that microsecond through heat adhesion may be bulging as it is coming out of the chamber. Firing a 30 Luger in a 9mm chamber would cause a gas bubble behind the bullet at the area where the cartridge is necked down, forcing the round out of the chamber sooner than the complete burning of the propellant. If the case has left the support of the chamber walls an is still expanding as it extracts you will get these types of bulges.
Anybody want to try this out to see what happens? 8^)
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That would make sense. The rim diameter is about the same on both calibers, and the bulge appears to be larger than any of those chambers would be. Unless it's a .45 Luger... ?
